Air hammer



FIG. 1 is a front perspective view of an air hammer embodying our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the air hammer that form no part of the claimed design. 

CLAIM The ornamental design for an air hammer, as shown and described. 